Work and Income boss Janet Grossman has quit less than a year after being head-hunted from the UK, amid controversy over the Government's welfare reforms.
Grossman was recruited in July last year from Britain's Pensions Service.
Like all top bureaucrats, Grossman was entitled to up to $50,000 relocation costs from the State Services Commission to help pay for flights, freight costs, up to eight weeks' accommodation and visa expenses.
Public Service Association national secretary Brenda Pilott thought the abrupt departure was the result of high pressure surrounding welfare reforms.
"The speculation I'd heard is to do with the board that's been put in place to oversee the reforms," she said.